I have consulted several English training institutions in Dongguan. Midland, EF, Translation Center, Longman, Patterson, Translation Center and Longman are cheaper, while others are more expensive. I don't know how the training effect is. Two short months, four long months, half a year. I suggest you go there by yourself.

Floor 4, Century Plaza, Dongcheng Avenue, Dongcheng District, Dongguan Midland (above Carrefour)

Floor 3, Annex Building, Jinying Building, Hesheng Road, Cheng Nan, Dongguan

Longman Patterson Cheng Nan Library

Next to the gate of People's Park, translation center.